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The authors thank Pasquale Serpico for useful discussions and Rudnei Ramos for comments. APR thanks Arturo de Giorgi for discussions about the quantization of stochastic scalar fields. The work of GB has been funded by a Contrato de Atraccion de Talento (Modalidad 1) de la Comunidad de Madrid (Spain) , 2017-T1/TIC-5520 and 2021-5A/TIC-20957. This work is partially supported by PID2021-124704NB-I00 funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe. This work is partially supported as well by the Spanish Research Agency (Agencia Estatal de Investigacion) through the Grant IFT Centro de Excelencia Severo Ochoa No CEX2020-001007-S, funded by MCIN/AEI/10.13039/501100011033. APR has been supported by Universidad Autonoma de Madrid with a PhD contract contrato predoctoral para formacion de personal investigador (FPI) , call of 2021. MP acknowledges support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC 2121 "Quantum Universe" - 390833306. MP thanks the IFT UAM-CSIC for hospitality during part of the realization of this work.

Analysis of institutional authors

Ballesteros, GuillermoCorresponding AuthorRodriguez, Alejandro PerezAuthor

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Article

Monomial warm inflation revisited

Publicated to:JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. 2024 (3): 003- - 2024-03-01 2024(3), DOI: 10.1088/1475-7516/2024/03/003

Authors: Ballesteros, G.; Pérez Rodríguez, A. ; Pierre, M.

Affiliations

Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany - Author
UAM, CSIC, Inst Fis Teor, Campus Cantoblanco, Madrid 28049, Spain - Author
Univ Autonoma Madrid UAM, Dept Fis Teor, Campus Cantoblanco, Madrid 28049, Spain - Author

Abstract

We revisit the idea that the inflaton may have dissipated part of its energy into a thermal bath during inflation, considering monomial inflationary potentials and three different forms of dissipation rate. Using a numerical Fokker -Planck approach to describe the stochastic dynamics of inflationary fluctuations, we confront this scenario with current bounds on the spectrum of curvature fluctuations and primordial gravitational waves. We also obtain purely analytical approximations that improve over previously used ones in the small dissipation regime for the amplitude of the spectrum and its tilt. We show that only our numerical Fokker -Planck method is accurate, fast and precise enough to test these models against current data. We advocate its use in future studies of warm inflation. We also apply the stochastic inflation formalism to this scenario, finding that the resulting spectrum is the same as the one obtained with standard perturbation theory. We discuss the origin and convenience of using a commonly implemented large thermal correction to the primordial spectrum and the implications of such a term for a specific scenario. Improved bounds on the scalar spectral index will further constrain warm inflation in the near future.

Keywords

Cosmological perturbation theoryDynamicsInflationModeParticle physics - cosmology connectionParticle physics- cosmology connectioPhysics of the early universeScalar-field

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 12/84, thus managing to position itself as a Q1 (Primer Cuartil), in the category Astronomy & Astrophysics.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-30:

  • WoS: 1
  • Scopus: 5

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-30:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 2 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Germany.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (BALLESTEROS MARTINEZ, GUILLERMO) .

the author responsible for correspondence tasks has been BALLESTEROS MARTINEZ, GUILLERMO.